Transmission frame mapping and demapping method and related device

Abstract

Embodiments of this application disclose a transmission frame mapping and demapping method and a related device. The method in embodiments of this application includes the following steps: first, obtaining a plurality of first code block streams, where the plurality of first code block streams belong to a same service, and each of the plurality of first code block streams includes a plurality of code blocks; then, performing code block-based interleaving on the plurality of first code block streams, to obtain a second code block stream; next, mapping the second code block stream to a transmission frame, and inserting indication information into the transmission frame, where the indication information is used to determine a location of the second code block stream in the transmission frame; and further, sending the transmission frame.

What is claimed is: 
     
         1 . A method, comprising:
 obtaining a plurality of first code block streams, wherein the plurality of first code block streams belong to a same service, and each first code block streams of the plurality of first code block streams comprises a plurality of code blocks;   performing code block-based interleaving on the plurality of first code block streams, to obtain a second code block stream;   mapping the second code block stream to a transmission frame, wherein the transmission frame comprises indication information, the indication information has a fixed quantity of bits, and a quantity of code blocks carried in the transmission frame is an integer; and   sending the transmission frame.   
     
     
         2 . The method according to  claim 1 , wherein a size of the code block in the first code block stream is 257 bits. 
     
     
         3 . The method according to  claim 1 , wherein a payload area of the transmission frame comprises the indication information, and a quantity of code blocks carried in the payload area is an integer. 
     
     
         4 . The method according to  claim 3 , wherein the transmission frame is an optical payload unit (OPU) frame, and the payload area carries 474 257-bit code blocks. 
     
     
         5 . The method according to  claim 1 , further comprising:
 checking the code block in the transmission frame to obtain check information, and inserting the check information into the payload area.   
     
     
         6 . The method according to  claim 5 , wherein checking the code block in the transmission frame to obtain the check information comprises:
 checking the code block carried in the payload area to obtain 32-bit CRC-32.   
     
     
         7 . The method according to  claim 1 , further comprising:
 performing synchronous processing on the plurality of first code block streams.   
     
     
         8 . The method according to  claim 1  wherein mapping the second code block stream to the transmission frame comprises:
 mapping the second code block stream to the transmission frame by using a bit-synchronous mapping procedure (BMP). 
 
     
     
         9 . The method according to  claim 1 , wherein a rate of the service is 800 GE or 1.6 TE. 
     
     
         10 . A method, comprising:
 obtaining a code block stream, wherein the code block stream comprises a plurality of code blocks;   mapping the code block stream to a transmission frame, wherein the transmission frame comprises indication information, the indication information is used to determine a location of the code block stream in the transmission frame, and the transmission frame sequentially comprises a first overhead area, a first payload area, a second overhead area, and a second payload area; and   sending the transmission frame.   
     
     
         11 . The method according to  claim 10 , wherein a size of the code block in the code block stream is 66 bits or 257 bits. 
     
     
         12 . The method according to  claim 11 , wherein the location of the code block stream in the transmission frame is a location of a 1 st  66-bit code block of a 1 st  row in the first payload area. 
     
     
         13 . The method according to  claim 10 , wherein N subframes in the transmission frame form a group, the indication information has N values, the N values respectively indicate locations of the code block stream in the N subframes, and N is an integer greater than  0 . 
     
     
         14 . The method according to  claim 13 , wherein the transmission frame comprises a first group of transmission frames and a second group of transmission frames, both the first group of transmission frames and the second group of transmission frames comprise N subframes, a value of the indication information of an i th  subframe in the first group of transmission frames is the same as a value of the indication information of an i th  subframe in the second group of transmission frames, and both N and i are integers greater than 0. 
     
     
         15 . The method according to  claim 13 , wherein N is 11. 
     
     
         16 . The method according to  claim 13 , wherein the N values of the indication information increase in ascending order. 
     
     
         17 . The method according to a  claim 10 , wherein the indication information is an overhead multiframe indicator (OMFI). 
     
     
         18 . The method according to  claim 10 , wherein the transmission frame comprises four rows and 3824 columns of bytes, an area from a 1 st  column to a 16 th  column in the transmission frame is the first overhead area, an area from a 17 th  column to a 1904 th  column in the transmission frame is the first payload area, an area from a 1905 th  column to a 1920 th  column in the transmission frame is the second overhead area, and an area from a 1921 st  column to a 3824 th  column in the transmission frame is the second payload area. 
     
     
         19 . The method according to  claim 10 , wherein
 the first overhead area or the second overhead area comprises the indication information.   
     
     
         20 . The method according to  claim 19 , wherein a 16 th  column in the first overhead area comprises the indication information. 
     
     
         21 . The method according to  claim 10 , wherein
 a quantity of code blocks carried in the first payload area and a quantity of code blocks carried in the second payload area are integers.   
     
     
         22 . A transmitting device, comprising:
 at least one processor and a transceiver, wherein the at least one processor is configured to control the transceiver to receive and send a signal, and the at least one processor is configured to perform operations comprising:   obtaining a code block stream, wherein the code block stream comprises a plurality of code blocks;   mapping the code block stream to a transmission frame, wherein the transmission frame comprises indication information, the indication information is used to determine a location of the code block stream in the transmission frame, and the transmission frame sequentially comprises a first overhead area, a first payload area, a second overhead area, and a second payload area; and   sending the transmission frame.